export default  {
	"title": '操作系统_在线1',
	"testId": '149475',
	"praxiseList": [
    {
      "id": 219654,
      "title": "银行家算法是一种(    )算法。",
      "options": "[\"死锁解除\",\"死锁避免\",\"死锁预防\",\"死锁检测\"]",
      "answer": "2",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:00",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "2"
    },
    {
      "id": 219655,
      "title": "采用资源剥夺法可解除死锁，还可以采用(    )方法解除死锁。",
      "options": "[\"执行并行操作\",\"撤消进程\",\"拒绝分配新资源\",\"修改信号量\"]",
      "answer": "2",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "2"
    },
    {
      "id": 219656,
      "title": "资源的按序分配策略可以破坏(    )条件。",
      "options": "[\"互斥使用资源\",\"占用且等待资源\",\"非抢夺资源\",\"循环等待资源\"]",
      "answer": "4",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "4"
    },
    {
      "id": 219657,
      "title": "系统启动后,操作系统常驻",
      "options": "[\"硬盘\",\"内存\",\"外存\",\"软盘\"]",
      "answer": "2",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "2"
    },
    {
      "id": 219658,
      "title": "操作系统的基本类型主要有",
      "options": "[\"批处理系统、分时系统及多任务系统\",\"实时系统、批处理系统及分时操作系统\",\"单用户系统、多用户系统及批处理系统\",\"实时系统、分时系统、多用户系统\"]",
      "answer": "2",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "2"
    },
    {
      "id": 219659,
      "title": "操作系统的功能是进行处理机管理、(    )管理、设备管理及信息管理",
      "options": "[\"进程\",\"存储器\",\"硬件\",\"软件\"]",
      "answer": "2",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "2"
    },
    {
      "id": 219660,
      "title": "操作系统的(    )管理部分负责对进程进行调度",
      "options": "[\"主存储器\",\"控制器\",\"运算器\",\"处理机\"]",
      "answer": "4",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "4"
    },
    {
      "id": 219661,
      "title": "操作系统是对(    )进行管理的软件",
      "options": "[\"软件\",\"硬件\",\"计算机资源\",\"应用程序\"]",
      "answer": "3",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "3"
    },
    {
      "id": 219662,
      "title": "操作系统为用户提供了操作界面是指",
      "options": "[\"用户可使用计算机打字\",\"用户可用某种方式和命令启动、控制和操作计算机\",\"用户可以用高级语言进行程序设计、调试和运行\",\"用户可以使用声卡、光盘驱动器、视频卡等硬件设备\"]",
      "answer": "2",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "2"
    },
    {
      "id": 219663,
      "title": "操作系统中采用多道程序设计技术提高CPU和外部设备的",
      "options": "[\"利用率\",\"可靠性\",\"稳定性\",\"兼容性\"]",
      "answer": "1",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "1"
    },
    {
      "id": 219664,
      "title": "如果分时操作系统的时间片一定，那么(    )，则响应时间越长。",
      "options": "[\"用户数越少\",\"用户数越多\",\"内存越少\",\"内存越多\"]",
      "answer": "2",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "2"
    },
    {
      "id": 219665,
      "title": "在分时操作系统中，进程调度经常采用(    )算法。",
      "options": "[\"先来先服务\",\"最高优先权\",\"时间片轮转\",\"随机\"]",
      "answer": "3",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "3"
    },
    {
      "id": 219666,
      "title": "在为多道程序所提供的可共享的系统资源不足时，可能出现死锁。但是，不适当的(    )也可能产生死锁",
      "options": "[\"进程优先权\",\"资源的线性分配\",\"进程推进顺序\",\"分配队列优先权\"]",
      "answer": "3",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "3"
    },
    {
      "id": 219667,
      "title": "分时操作系统又称为(     )操作系统。",
      "options": "[\"批处理\",\"多用户交互式\",\"单用户多任务\",\"应用软件\"]",
      "answer": "2",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "2"
    },
    {
      "id": 219668,
      "title": "关于文件的含义，比较恰当的说法应该是",
      "options": "[\"记录在存储介质上按名存取的一组相关信息的集合\",\"记录在存储介质上按名存取的一组相关程序的集合\",\"记录磁盘上按名存取的一组相关信息的集合\",\"记录磁盘上按名存取的一组相关程序的集合\"]",
      "answer": "1",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "1"
    },
    {
      "id": 219669,
      "title": "作业从进入后备队到被调度程序中的时间间隔称为",
      "options": "[\"周转时间\",\"响应时间\",\"等待时间\",\"触应时间\"]",
      "answer": "3",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "3"
    },
    {
      "id": 219670,
      "title": "从用户的观点看，操作系统是",
      "options": "[\"用户与计算机之间的接口\",\"控制和管理计算机资源的软件\",\"合理地组织计算机工作流程的软件\",\"由若干层次的程序按一定的结构组成的有机体\"]",
      "answer": "1",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "1"
    },
    {
      "id": 219671,
      "title": "从下面关于优先权大小的论述中，(    )是正确的论述",
      "options": "[\"计算型作业的优先权，应高于系统进程的优先权\",\"用户进程的优先权，应高于系统进程的优先权\",\"在动态优先权中，随着进程执行时间的增加，其优先权降低\",\"资源要求多的作业，其优先权应高于资源要求少的作业\"]",
      "answer": "3",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "3"
    },
    {
      "id": 219672,
      "title": "产生死锁的四个必要条件是：互斥、 (    )循环等待和不剥夺",
      "options": "[\"请求与阻塞\",\"请求与保持\",\"请求与释放\",\"释放与阻塞\"]",
      "answer": "2",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "2"
    },
    {
      "id": 219673,
      "title": "下面关于操作系统的叙述中正确的是",
      "options": "[\"批处理作业必须具有作业控制信息。\",\"分时系统不一定都具有人机交互功能\",\"从响应时间的角度看，实时系统与分时系统差不多\",\"由于采用了分时技术，用户可以独占计算机的资源\"]",
      "answer": "1",
      "type": "single",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "1"
    },
    {
      "id": 219674,
      "title": "在 Windows 环境下,假设已经选定文件,以下文件移动操作的叙述中,正确的有",
      "options": "[\"直接拖至不同驱动器的图标上\",\"用鼠标右键拖至同一驱动器的另一子文件夹上，从快捷菜单中选择“移动到当前位置\",\"用鼠标左键拖至同一驱动器的另一子文件夹上\",\"按住CTRL键，拖至不同驱动器的图标上\"]",
      "answer": "[2,3]",
      "type": "muti",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "[2,3]"
    },
    {
      "id": 219675,
      "title": "下列属于网络操作系统特性的是",
      "options": "[\"多用户、单任务\",\"运行在服务器和客户机上\",\"拥有自己的通信协议软件\",\"都是实时操作系统\"]",
      "answer": "[2,3]",
      "type": "muti",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "[2,3]"
    },
    {
      "id": 219676,
      "title": "顺序结构文件的特点是",
      "options": "[\"磁盘存储空间的利用率不高\",\"于用户户扩充文件\",\"存储空间不必连续\",\"便于随机存取\",\"存取信息速度快\"]",
      "answer": "[1,5]",
      "type": "muti",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "[1,5]"
    },
    {
      "id": 219677,
      "title": "树形目录的优点有",
      "options": "[\"解决了重名问题\",\"有利于文件的分类\",\"提高检索文件的速度\",\"能进行存取权限的控制\",\"管理简单，容易实现\"]",
      "answer": "[1,2,3,4]",
      "type": "muti",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "[1,2,3,4]"
    },
    {
      "id": 219678,
      "title": "文件的保密是指防止他人窃取文件，采用（     ）方法实现文件保密",
      "options": "[\"定时转储\",\"建立副本\",\"为文件设置口令\",\"规定文件使用权限\",\"将文件译成密文\"]",
      "answer": "[3,5]",
      "type": "muti",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "[3,5]"
    },
    {
      "id": 219679,
      "title": "关于一级目录结构说法正确的是",
      "options": "[\"一级目录结构是最简单的目录结构\",\"所有的文件都登记在同一个文件目录中\",\"一级目录结构简单，管理复杂\",\"一级目录不支持文件重名\",\"容易实现文件共享\"]",
      "answer": "[1,2,4]",
      "type": "muti",
      "hard": 1,
      "explain": "无",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "[1,2,4]"
    },
    {
      "id": 219680,
      "title": "下列文件中不属于物理文件的是",
      "options": "[\"连续文件\",\"链接文件\",\"°å½å¼æä»¶\",\"ç´¢å¼æä»¶\",\"æµå¼æä»¶\"]",
      "answer": "[3,5]",
      "type": "muti",
      "hard": 1,
      "explain": "æ ",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "[3,5]"
    },
    {
      "id": 219681,
      "title": "é¡ºåºç»ææä»¶çç¹ç¹æ¯",
      "options": "[\"ç£çå­å¨ç©ºé´çå©ç¨çä¸é«\",\"ä¾¿äºç¨æ·æ·æ©åæä»¶\",\"å­å¨ç©ºé´ä¸å¿è¿ç»­\",\"ä¾¿äºéæºå­å\",\"å­åä¿¡æ¯éåº¦å¿«\"]",
      "answer": "[1,5]",
      "type": "muti",
      "hard": 1,
      "explain": "æ ",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "[1,5]"
    },
    {
      "id": 219682,
      "title": "æ å½¢ç®å½çä¼ç¹æ",
      "options": "[\"è§£å³äºéåé®é¢\",\"æå©äºæä»¶çåç±»\",\"æé«æ£ç´¢æä»¶çéåº¦\",\"è½è¿è¡å­åæéçæ§å¶\",\"ç®¡çç®åï¼å®¹æå®ç°\"]",
      "answer": "[1,2,3,4]",
      "type": "muti",
      "hard": 1,
      "explain": "æ ",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "[1,2,3,4]"
    },
    {
      "id": 219683,
      "title": "ä¸åæä»¶ä¸­ä¸å±äºç©çæä»¶çæ¯",
      "options": "[\"è¿ç»­æä»¶\",\"é¾æ¥æä»¶\",\"è®°å½å¼æä»¶\",\"ç´¢å¼æä»¶\",\"æµå¼æä»¶\"]",
      "answer": "[3,5]",
      "type": "muti",
      "hard": 1,
      "explain": "æ ",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "[3,5]"
    },
    {
      "id": 219684,
      "title": "æä»¶æ¯æä¸å®æ ¼å¼å»ºç«å¨å¤å­ä¸çä¸æ¹ä¿¡æ¯çæåºéåã",
      "options": "",
      "answer": "1",
      "type": "charge",
      "hard": 1,
      "explain": "æ ",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "1"
    },
    {
      "id": 219685,
      "title": "æä½ç³»ç»æ¯ç¡¬ä»¶çä¸çº§æ©åï¼æ¯è®¡ç®æºçæ ¸å¿æ§å¶è½¯ä»¶ã",
      "options": "",
      "answer": "1",
      "type": "charge",
      "hard": 1,
      "explain": "æ ",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "1"
    },
    {
      "id": 219686,
      "title": "æä½ç³»ç»æ¯å¯¹è®¡ç®æºå¨é¨èµæºè¿è¡æ§å¶ä¸ç®¡ççå¤§åç¨åºã",
      "options": "",
      "answer": "1",
      "type": "charge",
      "hard": 1,
      "explain": "æ ",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "1"
    },
    {
      "id": 219687,
      "title": "å½è¿ç¨æ°å¤§äºèµæºæ°æ¶ï¼è¿ç¨ç«äºèµæºä¸å®ä¼åºç°æ­»éã",
      "options": "",
      "answer": "-1",
      "type": "charge",
      "hard": 1,
      "explain": "æ ",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "-1"
    },
    {
      "id": 219688,
      "title": "å½æ£æµåºåçæ­»éæ¶ï¼å¯ä»¥éè¿æ¤æ¶ä¸ä¸ªè¿ç¨è§£é¤æ­»éã",
      "options": "",
      "answer": "-1",
      "type": "charge",
      "hard": 1,
      "explain": "æ ",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "-1"
    },
    {
      "id": 219689,
      "title": "æä»¶ç³»ç»ç¨ä»¥ç®¡çå­å¨å¨ç£çä¸çæä»¶èµæºï¼ä»»ä½ä¸ç§æä½ç³»ç»é½æä¸ä¸ªç³»ç»æä»¶ã",
      "options": "",
      "answer": "1",
      "type": "charge",
      "hard": 1,
      "explain": "æ ",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "1"
    },
    {
      "id": 219690,
      "title": "æä»¶æ¯æä¸å®æ ¼å¼å»ºç«å¨å¤å­ä¸çä¸æ¹ä¿¡æ¯çæåºéåã",
      "options": "",
      "answer": "1",
      "type": "charge",
      "hard": 1,
      "explain": "æ ",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "1"
    },
    {
      "id": 219691,
      "title": "æä½ç³»ç»æ¯ç¡¬ä»¶çä¸çº§æ©åï¼æ¯è®¡ç®æºçæ ¸å¿æ§å¶è½¯ä»¶ã",
      "options": "",
      "answer": "1",
      "type": "charge",
      "hard": 1,
      "explain": "æ ",
      "regtime": "2021-06-18 10:00:01",
      "last_time": null,
      "iscorrect": 1,
      "user_answer": "1"
    },
    {
      "id": 219692,
      "title": "æä½ç³»ç»æ¯å¯¹è®¡ç®æºå¨é¨èµæºè¿è¡æ§å¶ä¸ç®¡ççå¤§åç¨åºã",
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